Die casting machine



Sept. 13, 1932. E..HoTTER DIE CAsTNG MACHINE Filed May 22. 195o 5 Sheets-Sheet 1 Qin@ Sept. 13, 1932.

E.A HOTTR DIE cAs'mi` MACHINE Filed May 22. 1930 s sheets-sheet 2 IQ Edwmi, How r QQ@ @u bw o QQ Q m hw om 1d. du@ X w .1 1 il ...u mw @m mn E l l l l l H l- :um J1.. r mm m, 8%.@ A NF Hilir -x 1 4 l u @m tm! g E ,wm am@ 1 I J E .Ul

Spt 13, i932. E, MGT-TER I DIE CASTING MACHINE Filed May 22, 1930 3 Sheets-Sheet 3 @www Imran/i3? f lfd/ward, brd/'Z765' @j M, %m,m a@

Patented sept. 13, v1932 UNITED STA i EDWARD HOTTER, F CHICAGO, ILLINOIS DIE CASTING MACHINE Application filed May 22,

i My invention relates generally to foundry equipment and has to do more particularly l with die casting machines.

1" 11 object of my invention is to provide a die casting machine which will automatically bring the dies .into and out of cooperative relation and will automatically cast the metal, insert and pull cores from the dies, and e]ect.

i as the description proceeds.

Referringnow to thedrawings yforming part of this specification and illustrating a preferred embodiment of my invention;

Fig. 1 isa side elevation of'a die casting -f machine, embodying my invention;

' Fig. 2 is a top .planview of the same;

Fig. 3 is a sectional viewtaken substantially on the line 3 3 of Fig. 2; v

Fig. 4 is asectionl view taken substantially on the line 4 4 of Fig. 3; p Fig. 5 is a .sectional view taken substantially on the. line 5 5 of Fig. 4;

Figs. 6, 7 and `8 are sectional views taken substantially on the line 6 6, 7 7 and 8 8, respectively, of Fig'. l; and Fig. 9is a top plan View of certain cams forming features of' my invention and adapted for actuating the movable die and the,

core pulling apparatus, respectively. i 'In tliedraWings,-the numeral 10 represents a pot or receptacle adapted for holding molten metal which is mounted in .a fire box 12. This receptacle may be heated by any suitable means, such as a gas or oil burner 13. *f Spaced from the fire box 12, as best shown in Fig. 1, is a frame member 15, supporting a journal 16 for rotatably mounting a main drive shaft-'17. .Rotary motion may beA im#- 'parted to the drive Ashaft by any suitable 5 nie-ans (not shown). Arranged on one end 1930. j semi no. 454,531",

ofthe drive shaft is a beveled gear 18, (Fig. 6), meshing with a`pair of pinibns 19 and 19' loosely carried b'y a shaft 20. Splined to the shaft 20is'- .a 'two-faced clutch member 21, pivotally connected as atl 22 to a lever 23, which in tur ispiyoted to the frame 15, as at 24. The lever 23 is piyoted adjacent its other end to a link 25 which, as best shown in Fig. 6, is preferably formed in a pair of mem*- bers pivoted to each other so as to permit a certain amount of lost motion therebetween. vThe link 25 extends through' a guide sleeve 26 attached to the 'frame 15 and is pivoted as at 28r to a handr lever 29, which is pivotally secured adjacent its end, as at 30, to the frame "t 15. Thus; it will be noted that a swinging move- `I'nent of the lever 29 either to the ri ht. or left, as shown in Fig. 6, will result in ringin the clutchv member 21 into cooperative re` ation with one or the other of the bevel gears 19 `or 19', it being understood that these gears are provided with faces 'adapted to cooperate With the faces ofthe clutch member..v As shown in Fig.`6, theclutch member is inl cooperative engagement -with the bevel gear 19". As will become apparent later, this arrangement of. the clutch and bevel gears 19 and 19' isl provided vso as permit reversing the motion of the partsl to described.

Keyed to the shaft 20 is a pair of spur gears 32 and 32', which meshwith a pair of similar gears 33 and 33', mounted on a shaft 34. Rotatable with this shaft, as shownfbest in Fig, 8, is a Worm 37 which meshes with a 85 worm wheel 38, keyed toa Vshaft 39. This `worm wheel has a pair of pins 40, which, as best-shown in Fig.l6, extend from a face of the wheel into the path of' a lug 42 which projects laterally from one side of the lever 23. The pur ose of this arrangement, as discussed more ully below, is to automatically throw the clutch 21 into 4neutral position at certain predetermined points in the operation `of the machine.

As best seen in Fig. 3, the shaft 39 is journaled in bearings 44 and 44' carried by the frame 15, and has secured tothe central portion thereof cranks 45 and 45', connected by i a crank pin 47, which exten'ds through a pair 100 provided-with a curved'cam slot 51 and they plate 50 is provided with an oppositely curved these slots and being secured 'by nuts or the like at opposite ends ofthe pin.

As will be seen from Fig. v9,`the curved central ortionsof the cam slots are on arcs struck rom theaxis of the shaft 39, While the end :portions 'of the slots extend substantially at right angles-to the direction of movement ot thecam'plates. From this, it will be seen that the'movement ofthe in 47 from the position shown in Fig. 9ine1therdire: tion about the axis of shaft 39 VWill first cau'se a movementof the cam plate l to the rightand later a movement of thecam plate in the same direction; While on the return movement of the pin 47, the cam plate 50 Will be tirst shifted to the left, and later the cam plate 51 will undergo a movement in the same direction.

The cam plate 50 is slidable on rods 50 and 50,b carried by the framev 15 and a stationary frame 60,-and has secured thereto a rod 53 which is threaded into a cylindrical member55, the screwbeing secured-by y,means offnuts `56l or the like within' the cylindrical membergandan adjusting lvnut157 beingfpro-I vided outside Ithe. cylindrical member so as Secured tlthe sleeve' 59 opposite the-frame 60 andextending,throughiajslot 59a in sleeve 59 and a slot 55 in cylindrical member 55 is a bar 61,` for a urpose which will presently be described, thls bar being carried by a pair of adjusting screwsl lthreaded through a flange59. on sleeve 59. The cylinderfalso extends through a stationary guide frame 63I and hasmounted on lits vouter'end a" die car# rier 65 which is slidably mounted on a plurality of guide rods 66, 66?, 66,c and 66?,- Fig. 4, these rods being securedto the frame 15 at oneend and to the fire box -12 at the other end# Detachably ysecured to the die carrier 6 5 is the movable, section 68 of a'suitablexdie which maybe of any'desired type according 'to the work tobe cast. i

. Thej'member l65 has a substantially .central a erture through vwhichextends. a slidabley punger 69, this-plunger @having attached to the.` forward end thereof. an 4ejecting member z to'a frame 73 attached to the Wall of the fire box 12. Y

L y :"'The lcam member 51, which Will beidesigcam slot-50", the crank pin 47 lriding in bothn'ated as the 'core-pulling cam, is guided by the cam `50, as best seen 1n Fig. 6,`the cam 50 bein 'channeled to'seat cam 51, and said cam mem er 51 is secured to a pairof rods 51al and 51" which extend through the guide frame 60. These rods are secured at their forward ends to a crosshead-7 4 carrying sleeves 75 and 75', which in turn carry rods 76 and 76. As shown best in Figs. 4 and 5,- the rods 76 and 76 are slidably mounted in bearing blocks 77 carried by a frame 78 which is supported by the rods 66, 66?, 66e, and 66d,`and are provided With rack teeth 8O adjacent one end thereof, these teeth cooperating with elongated pinions 81. Each pinion 81 actuiates a core-pulling member 82, the latter bein g provided with rack teeth cooperating with' the pinion. -The numerals-'183 represent cores which are inserted and Withdrawn by means of the rcore, pulling mechanism just described.

The rods 76 and 76 Whichactuate the core pullers may be adjusted relative to the cross head'74 by means of nuts 84 (Fig. 2). It will be noted ,by reference to Fig.v 5 that the rack teeth 80 formed on the rods/76 and 76 do not .extend entirely -to the end of these rods, the latter being blank or untoothed as indicated 'atl80". The-purpose of this construction is .Y to permit, by adjustment of the'. rods 76 and 76 by means of the nuts 84, the insertion and "pulling" of cores'o't 'difl'erent lengths by the respective rods 176 and 7 6. It will be obvious .being formed with vertical slots 85 through4 Furthermore. 5'-

., 70..,(Fig`. 3f( @This ejecting member may be Offany wellknown or suitable typefanditi i j v vill'be.notedvthat when'thedie ycarrier 65 is moved backwardly or .to theifrightI in Fig.'.3,

the plunger' e 69 will vabut against the bar '61 and'lthe ejectorjvvill thus: be'brought into en--J i be` ejected from-the' movable-die member 68;v

thatthe untoothed portionf80 of the rods-resultsin lost ymotion after the teeth 80 have passed over the pinion 81, so that the pinion will be rotated only to a certain extent, ac-

cording. tothe initial vadjustmentpof its cooperating rod 76 or 7 6. v

As shown in Figs. 4 and 5, the core-pulling member 82can be adjusted vertically lengthwise of lthe elongated pinion 81 and held in adjusted position by means of a plate 85 formed to embrace op osite "walls ofthe frame'78 -and bearing lock77 and slotted crosswise'to seat the rack bar 82; saidnlate which pass clamp screws 85a. it will be seen that the core-pulling member 82 is provided with a coregripping head 86, .which'is elongated transversely ofthe direc- -tion of the pinion v81, so that the core may be positioned at various pointsv thereon. By

means o'f this arrangement, the core puller maybe adjusted at any desired postion to accommodate various types .and locationsV of cores.

' Fast on the upper end ofshaft 39,as best'- K y 4 ,seen in-Fig. 3isfna A.crank/87 carrying-apin .gagementlwlth the'work andgth'e 1;`;,i;ter -will" 88 which is mvablef'in-a. slot '90 of a cam .member 91. This cam member is connected means ofV a. stemy 9'1 .andcross "head 92 nuts 100.

tend through the frames and 73. .To the cam is connecteda rearwardly extending rod 954which slides through a boss 96 attached to the frame 15.

Referring now to Figs. 1, 2 .and 7, tbe threaded endsy of rods 93, 93 forwardly of the frame 73 are passed through ears 100i of a frame 102, which, as best'seen in Fig. 2, is H- shaped in plan view, the ears 100 being formed on opposite ends 'of one leg of the H, and the rods being locked to the ears by This frame is slidable on rods 104 and 104 which are supported by means of a casting 105 above the iire box 12. Secured to the web portion 107 of the H-frame 102 as by means of bolts 108 is a vertically disposed H-'shaped bracket 110, the latter depending from the frame 102. The bolts 108 pass through vertical slots 113 in the sides of the bracket whereby the latter is made vertically adjustable; and adjustment of the bracket, when the bolts 108 are loosened, may

be made by means of a screw 111 which passes loosely through a hole 107 in the web 107 and'is'connected at its lower end to'the web of the bracket 110, and on its upper end receives an adjusting nut 112..- l

Rotatabl journaled in thelower legs ofv the H-brac et 110 is a pintle 115, secured to the frame by meansV of screws 1163er the'like and attached to4 a head 117. This head carries a tubular goose neck 120, terminating in a spout 121 adapted to extend through an he frame 73 for depositing metal inthedies. Extending rearwardly from the goose'neck is another head v.12.4, in which are mounted a.

4'pair of pintles 125 (Figa-2). Thesev pintlesare adjustable relative to the head'lby meansv of set screws 127, in order that the pi-ntles 'may be perfectly seated in camp-grooves 128 formed 1n the casting 105, which grooves extend rearwardly and -thence upwardly.

. reversed when the H-frames are moved to It will thus be noted that the goose neck,

-" when Amoved rearwardly or tothe left lin Fig.

1 by means of the H-brackets'102 and 110, will be causedto dip downwardly -into the rece tacle 1.0, so as to receive a charge of mo ten metal, pivotingV about the axis ofthe pintle 1.15 as thelpintles 125 are forced upwardly along the cam grooves 128. This motion is the right, the goose neck then being moved to casting position shown in Figs. '.1 and 2. A suitable hoseA or pipe -122 communicates with the rear end of the goose neck 120 for. supplying compressed air or other fluid under pressure into the goose neck and thus forcing l the metal therefrominto the die. Y

The' operation of the machine is'substantially asfollowsa The shaft 17 having been setin operatiommotion is transmitted to the bevelgear '.18 When the clutch member 21 keyed tothe shaft 20,i's moved bymeans of the hand' lever 29 into engagement with one or the other of the bevel gears 19 or 19', motion'is transmitted through the spur gears 32, 33 and 32', and 33 to the worm wheel 38, the direction of rotation of this worm wheel and its shaft depending upon which of the bevel gears 19 and 19 happens to be clutched.

Assuming lthat the parts are in the positlon shown in Fig. 3, rotation' of the shaft 39 by the worm wheel 38 causesthe crank pin 47, through the cam plate 50 and the connectlons of the latter to the movable die, to first move the movable die member toward the fixed die member, but before said die members are' brought together. the pin 47 acting on the The same half revolution of the neck 120 shifts the latter from its outward elevated position to the position shownin Fig. 1, thereby loading the'goose neck w1th a charge of molten metal. At the lconclusion of these movements (effected by' a half revolution of'shaft 39) the drivin clutch is automatically thrown to neutral y one of the pins 40 on the worm gear, the compressed air is turned on through hose 122, and the charge of molten metall is forced into the die. As soon as the casting in the die has cooled suiliciently to be withdrawn, the operator throws the -clutch into engagement with the other bevel wheel, and the shaft 39 is' rotated a half revolution in the reverse direction. This irstv withdraws the core members, and then' retracts the movable die member 78 -to the position shown in Fig. 3;

fixed' ar 61 and thereby ejects the work from sthe movable die member 68. By means of the adjusting screws 61', which determine .the

position of the ejector abutment bar 61, the point at which the ejector begins to act can be accurately determined. At the conclusion of these movements the machine is again automatically stopped by one of the pins 40 coming in contactvwith the lug 42 on the clutch shift-lever;` the casting isremoved from between the die members, and the described cycle is then repeated. The object of the automatic interruption in the motion of theparts iste permit a delay of any de sireddperiod after the die has been charged, in or er that the metal may set. Since this period will vary according to the .type .of work, it' is intended that' an operator shall determine the time which is to lapse before resuming theoperation, the resumption being effected by manipulation of the .hand lever 29, ras described.,A .c

f 1.I In a ydie casting. machine, in combina-l tion,'a stationary die, a movable die, a core movable into andoiit of said dies, a channely shaped member having a cam slot in the/ web portin thereof, a cam platey slidably.

mounted in said channel-shaped member and also having a cam slot therein, means connecting one of said cam members to said-movable die, means connecting the other of saidcani members to said core, and means for actuatengaging both of said cam slots.

2. In a die casting machine, in combination, a stationary die, a movable die, a core movable into and out of said dies, a channelshaped member havinga cani slot in the Web portion thereof, a cam plate slidably mounted in said channel-shaped member and also having a cam slot therein, means connecting one of said cam members to said movable die, means connecting they other of said cammembers to said core, and means for actuating said cam members comprising a rotary device and a pin positioned eccentrically on said rotaryV device and extending through and engaging botlrof saidv cam slots, one

movable into-and out of said dies, a iirst plate having Va cam slot therein, a second plate slidablymounted adjacent said first/plate and also having a cam slo't therein, means connecting one of said` cam plates to said movable die, means connecting the other of said cam plates to said core, and means for actuatingl said cam'platescomprising a' rotary'device and a pin positioned eccentrically lon said rot-ary device and extending' through A and I engagingfboth of said cam slots, one of said v Cam slots having an arcuate lportionfonfa radius equalto the radiusy ofsaid .eccentric pin and concave in one direction, the 'slot in said.`

one cam plate having. a portionot substantially equal curvature and concave in the opposite direction.-

4. In a die casting. machine, in combination, dies, cores slidably mounted for move- Hence,l do not Wish to be limited to the ment `into" 21ndv out of the-inol'd' 'form'ed'rby the dies,fandmeans for supporting andfactuat- ,i

ing said cores comprising a slide adjustable vertically of said dies, a member movable hor-A izontally on said slide and carrying axcore,

a rack on said -meinber, lan elloiigaterdfpinion meshing with said rack and clcctive tolactuate the rack in all positions of .theel-ide, ineansfor rotating said pinioncomprising a second rack movable intoand out of en-l ing a cam platel connected thereto, and a gaging a slot i'n said cam plate.k

gagement With said pinion so vas to provide-`l a lost motion connection therebetween, meansfor reciprocating said second rack compris- ,rotatably mounted crankliaving a pin en- A 5. ln a die casting machine', in onibination, dies, cores slidably iiiounte'dipi' movement into and out of the mold formed by fthe' dies, and means for supportin'g'and actu- 1r: ing said cam members comprising a rotaryV device and a pin positioned eccentrically on" said rotary device and extending through and ating said cores comprising Ia slide adjustable core, arack on said member, an` elongated pinion meshing with said rack and effective vertically of said dies,' a iniember l movable horizontally on'r said slide and cari-'ying a;

to actuatethe rack in all positions of the slide, means for rotating said pinion comprising a second rack movable into and out of engagement With said pinion so as to pro'- vide a lost motion connectiontherebetween,

and means for reciprocating said second rack.

v6. In ar die casting machine, in 'combination, dies, cores slidably mountedfor movement into and out of tlie mold formed by- "thedies, andineans for supportingand actuating said cores comprising af slide adjustable vertically of said dies, jay-member movable horizontally on'said slideand adapted to carry a core, a rack on said member, an

elongated pinion meshing with said rack and 'r leffective to actuate the rack and in all positions of said member, andnieans for rotating said pinion.

7. Inra die casting machine,

movable into and out of said dies, a first plate having a cam slottherein, a second plate slidably mounted adjacent said first plate and also havingV a cam slot therein, means connecting one of said cam plates to said trically,l on said rotaryv device and extending through and `engaging-both of-said cam slots- 8.' Ina die casting machine,ein=combina tion, a stationary die,- a movable die', famovably moiinted'container for supplying 'metal vin combina-4 tion, a stationarydie, a movabledie, a core -a ice to the dic, a core movable'intoand'outof the ldie, means for-actuating said parts'in timed relation" comprisin nected tosaidmovale die, a second cam plate connected to said container, and a third cam plate connected to said core, a rotatably mounted shaft, a crank on` said shaft carrying a pin engaging slots in said first and second cam plates,j and a second crank on said shaft carrying aA pinI engaging in a slot 1n!7k ably mounted on said bars for movement to- Ward and from said die, a bracket adjustable vertically on said carrier, a. member pivotally .mbunted on the lower end of said bracket and secured to the other end of said gooseneck,

- a cain follewei on said gooseneck, and a cam slot from said follower mounted on said support and having a portion parallel to said slide bars in which the follower moves-while the nozzle is being inserted into and withdrawn from said die, the remainder of said cam slot being curved and inclined upwardlyl so `as to dip the gooseneck after the nozzle has been withdrawn horizontally, and means for actuating said carrier.

' 10. In a 'die casting machine, in combinadrawn from said- ,port and having 1 the nozzle 1s being inserted lnto and withtion, a support, a stationary die mounted on l said su port,a gooseneck for dipping molten J metal' rom a container and having anozzle V movable into register with an openmg 1n said die, means for mounting said gooseneck comprising a pair of laterally spaced horizont-icallyon said' carrier, a member pivotally 4 'mounted on the lower'end of said bracket and i secured totheother end of-:said gooseneck, a

cam follower on 'said gooseneck,van d a cam slot for said follwermounted on said sup- `a portion parallel to said slide bars in wh-iclthe follower moves while ie the remainder of said cam slot being curved and inclined upwardly i V- iso as todip lthegooseneck after the nozzle ',fyhas been withdrawn horizontally, and vmeans Vfor reciprocating'said carrier.

' l1-.- In;a die casting'machine, 1n combination, a support, a vstationary die mounted i on said support, `a gooseneck for dipping in said die,

' toward and from said die,

- molten metal from a container and having a nozzle movable 'into register with an opening meansv for mounting said gooseneckcbmprising a air of laterally spaced horizontally extending slideways, a carrier slidably mounted on said ways formovement a bracket adjustable vertically on said carrier, means pivot- --Y'all-y--mountingtheotherend of said gooseneck on the lower end of said-bracket,1,a cam follower on said gooseneck, and a cam slot for said follower mounted said support.

neck for dipping molten metal out of said container and having a nozzle movable into register with'an opening in 1saiddies, and means for actuating said movableparts comprising independently movable cam plates connected one toeach o f said movable parts and having cam slots therein, and means for actuating said cam plates comprising a rotatably mounted shaft, a pair .ofcrank pins supported eccentrically on said shaft, one -of saidcrank pins engaging in one of said cam slots and the lother lof said crank plns enga-ging in the other cani slots, and means for rotating said shaft, said cam slots having arcuate middle portions and substantially 'straight end portions extending transversely of the path of movement of the cam plates.

13.v lIn a die casting machine, in combination, a stationary die, a movable die, a core movable into and metal container, a neck for dipping molten metal out of said ou' of said dies, a molten ovablymounted goosecontainer and having a 'nozzle movable-into register y,with an openingin said dies, and means for actuating said movable parts comprising independently movable cam plates connected oneto each of said movable parts and having arcuate cam slots therein, and means for actuating said cam plates comprising a rotatably mounted shaft, la pair of crank, pins supported eccentrically on said shaft atparadius approximately. equal to that of said slots, one of said: crank pins enraging in one-of said cam slots and the other of said crank pins engaging in the other cam s1ots,and lmeansforf rotating said shaft.

14. In a dieV casting machine, in combination, a stationary die, a movable die,and`

having acentral portion arcuate in form on a radius equal to the radius of said eccentric pin and substantially straight end portions extendingtransyersely 'of the direction .of movement of sald plate, and means connecting said cam plate to said movable die.

HOTTER. 

